diff options
Diffstat (limited to 'sys/compat/vax1k/vax1k_exec.c')
| -rw-r--r-- | sys/compat/vax1k/vax1k_exec.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/sys/compat/vax1k/vax1k_exec.c b/sys/compat/vax1k/vax1k_exec.c new file mode 100644 index 00000000000..a2e37b3916e --- /dev/null +++ b/sys/compat/vax1k/vax1k_exec.c @@ -0,0 +1,145 @@ +/* $OpenBSD: vax1k_exec.c,v 1.1 2001/11/14 14:37:22 hugh Exp $ */ +/* $NetBSD: vax1k_exec.c,v 1.1 1998/08/21 13:25:47 ragge Exp $ */ + +/* + * Copyright (c) 1993, 1994 Christopher G. Demetriou + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Christopher G. Demetriou. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * Exec glue to provide compatibility with older NetBSD vax1k exectuables. + * + * Because NetBSD/vax now uses 4k page size, older binaries (that started + * on an 1k boundary) cannot be mmap'ed. Therefore they are read in + * (via vn_rdwr) as OMAGIC binaries and executed. This will use a little + * bit more memory, but otherwise won't affect the execution speed. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/proc.h> +#include <sys/malloc.h> +#include <sys/vnode.h> +#include <sys/exec.h> +#include <sys/resourcevar.h> + +#include <compat/vax1k/vax1k_exec.h> + +int exec_vax1k_prep_anymagic + __P((struct proc *, struct exec_package *, int)); + +/* + * exec_vax1k_makecmds(): Check if it's an a.out-format executable + * with an vax1k magic number. + * + * Given a proc pointer and an exec package pointer, see if the referent + * of the epp is in a.out format. Just check 'standard' magic numbers for + * this architecture. + * + * This function, in the former case, or the hook, in the latter, is + * responsible for creating a set of vmcmds which can be used to build + * the process's vm space and inserting them into the exec package. + */ + +int +exec_vax1k_makecmds(p, epp) + struct proc *p; + struct exec_package *epp; +{ + u_long midmag, magic; + u_short mid; + int error; + struct exec *execp = epp->ep_hdr; + + if (epp->ep_hdrvalid < sizeof(struct exec)) + return ENOEXEC; + + midmag = ntohl(execp->a_midmag); + mid = (midmag >> 16) & 0x3ff; + magic = midmag & 0xffff; + + midmag = mid << 16 | magic; + + switch (midmag) { + case (MID_VAX1K << 16) | ZMAGIC: + error = exec_vax1k_prep_anymagic(p, epp, 0); + break; + + case (MID_VAX1K << 16) | NMAGIC: + case (MID_VAX1K << 16) | OMAGIC: + error = exec_vax1k_prep_anymagic(p, epp, sizeof(struct exec)); + break; + + default: + error = ENOEXEC; + } + + if (error) + kill_vmcmds(&epp->ep_vmcmds); + + return error; +} + +/* + * exec_vax1k_prep_anymagic(): Prepare an vax1k ?MAGIC binary's exec package + * + * First, set of the various offsets/lengths in the exec package. + * Note that all code is mapped RW; no protection, but because it is + * only used for compatibility it won't hurt. + * + */ +int +exec_vax1k_prep_anymagic(p, epp, off) + struct proc *p; + struct exec_package *epp; + int off; +{ + long etmp, tmp; + struct exec *execp = epp->ep_hdr; + + epp->ep_taddr = execp->a_entry & ~(VAX1K_USRTEXT - 1); + epp->ep_tsize = execp->a_text + execp->a_data; + epp->ep_daddr = epp->ep_tsize + epp->ep_taddr; + epp->ep_dsize = execp->a_bss; + epp->ep_entry = execp->a_entry; + + /* set up command for text segment */ + NEW_VMCMD(&epp->ep_vmcmds, vax1k_map_readvn, + epp->ep_tsize, epp->ep_taddr, epp->ep_vp, off, + VM_PROT_WRITE|VM_PROT_READ|VM_PROT_EXECUTE); + + tmp = round_page(epp->ep_daddr); + etmp = execp->a_bss - (tmp - epp->ep_daddr); + + /* set up command for bss segment */ + if (etmp > 0) + NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, etmp, tmp, NULLVP, 0, + VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); + + return exec_setup_stack(p, epp); +} |